Frequency-independent dipole

SUBSTANCE: device is a dipole whose radiating arm lies over a passive arm (base) and on its opposite side there is a matching circuit in form of a parallel circuit consisting of two conductors connected in series and a capacitor. The common end of the capacitor of the circuit and one of the conductors of the matching circuit are connected to the radiating arm of the dipole through a coupling capacitor, and its other ends are connected to the outer side of the passive arm of the dipole, respectively. The arms of the dipole and conductors of the matching circuit are made from plates and capacitor elements are made from pieces of coaxial cable. Corresponding ends of the arms of the dipole and the matching circuit are connected via dielectric supports. Metal grids in form of cones, on whose apexes there is an antiradar plate, can be soldered to outer sides of the radiating arm of the dipole and conductors of the matching circuit.

The invention relates to the field of radio, antenna-feeder equipment and can be used to build different types of frequency-independent radio and television aerials.

The use of the invention allows to build different types of frequency-independent radio and television antennas ratio of frequencies in the range of 20:1 with an SWR<2,5.

Antenna vibrator is a symmetric electric vibrator bearing shoulder which is over passive shoulder (bottom). Passive shoulder vibrator connected inner braided supply line in the form of a coaxial cable, and to the radiating arm of the vibrator - the inner conductor of the line and the capacity of the connection with a matching chain, made on the outer side of the passive arm of the vibrator in the form of a parallel circuit consisting of two conductors connected in series and capacitance of the circuit, the total end of it and one of the two conductors of a matching network connected to the opposite end of the vessel connection with radiating shoulder of the vibrator and the other end of the tank circuit and a matching circuit connected to the outer side of the passive arm of the vibrator.

The ends of the radiating arm of the vibrator and guide the matching circuits are connected to a passive shoulder with dielectric supports. To the outer side of the radiating arm of the vibrator and guides the matching circuit soldered metal mesh in the form of cones,
inside the tops of which is a plate made of radar absorbing material.

Among the known vibratory antennas there is a wide variety of methods for their constructive execution, nutrition, balancing and reconciliation:

The lack of such vibrators - narrow bandwidth, due to the fact that the dipole is equivalent to the 2-wire line losses, open at one end (Sazonov D.M. Antennas and microwave devices. M.: Higher school. 1988, s-235), the input impedance of which is a periodic function of the arm length of the vibrator and the waves. However, depending on the ratio of these lengths input resistance equivalent series or parallel circuit, and when the offset occurs a significant reactive component of impedance, which leads to escapologist when negotiating supply line and a vibrator.

At the same time, the symmetric half-wave vibrator front beamwidths equal to the posterior lobe, which reduces noise and coefficient directional (G=1,64 or of 2.15 dB) (Rodionov V.M. transmission Lines and antennas of the criminal code is.
M: Energy. 1977, p.64).

To increase the coefficient of directional apply Director of antennas and antenna type "wave channel", but they are still narrow and cumbersome devices.

To increase bandwidth used combination of Director antenna (log periodic antenna), while the overlap factor of the frequency range can be 10:1 when the CWS=2 (Sazonov D.M. Antennas and microwave devices. M.: Higher school. 1988 s-272).

Log periodic antennas are also quite complex and cumbersome devices. Closest to the proposed invention is a patent RU 2132587, IPC6H01Q 9/16.

In this invention to radiant shoulders symmetric electric vibrator through baluns and matching circuit connected coaxial line (power). Baluns and matching circuit is made in the form of a segment of cable with two conductors, which are connected in series at one end of the cut cable, but on the other end they are consistently included in one of the two conductors of the supply environment, which are connected to different arms of the vibrator, and the outer conductor to the shoulders of the vibrator is not connected. The overlap factor of the frequency range of 10:1 when the CWS=2,5.

Symmetrise and the matching device of the present invention has the following disadvantages:

1) to instructiona the complexity of implementation;

2) no galvanic connection of the outer conductor of a matching network with a vibrator;

3) an impedance of coaxial feed line is 50 Ohm.

The structural complexity of the matching network due to the need for connection of conductors with distributed parameters contained within the segment of cable, cable, power line, as well as simultaneous balancing and alignment vibrator. No galvanic connection of the outer conductor of a matching network with a vibrator leads to additional reactivity, which reduces the bandwidth negotiation.

Constructive performance simmetriya and matching network does not allow the use of a coaxial line power supply with an impedance of 75 Ohms, while the input impedance of electric vibrator at l/λ=0,25 (l is the geometric length of the forearm of the vibrator, λ is the wavelength) is approximately equal to 75 Ohms (Sazonov D.M. Antennas and microwave devices. M.: Higher school. 1988, s).

The aim of the invention is to simplify the design of a matching network, the greater bandwidth at a lower VSWR, ratio directional and noise immunity.

The aim is achieved in that the matching circuit is made in the form of a parallel circuit consisting of two conductors connected in series, the total geometric length of their men is higher λ/4,
and capacity, the total end through which the tank is connected to the radiating arm of the vibrator, and the other ends of the tank circuit and a matching circuit connected to the passive arm of the vibrator, while the radiating arm of the vibrator is on passive shoulder of the vibrator (the Foundation). The conductors of the matching circuit and the shoulders of the vibrator is made of plates, to a passive shoulder which are connected the ends of the radiating arm and the conductor of the matching circuit with dielectric supports, and to the outer sides of the radiating arm of the vibrator and guides the matching circuit soldered the ends of the metal mesh, side of the cell which are 0, 1 λ min, in the form of cones, and their tops attached stealth plate.

This choice total geometric length of segments matching chain, made in the form of a parallel circuit provides compensation of amplitude-frequency characteristics of the vibrator with a periodic sequence changes its input resistance. Because the radiating arm of the vibrator is on his passive shoulder, it is similar to the coil antenna, which increases the ratio of directed action, and the absence of a eld over conductors radiating shoulder and a matching network allows the metal shield in the form of cones, soldered thereto, and the nalitch the e radioparadise plates inside them provides an absorbent passage concerns
fluctuations useful source, and the outer side of the screen reflects concerns fluctuations other sources, which increases the noise immunity of the vibrator.

The invention is illustrated by drawings:

figure 1 - scheme of connection of the elements of the frequency-independent vibrator 1;

figure 2 - example of frequency-independent vibrator;

figure 3 - example of frequency-independent vibrator 2;

figure 4 - experimental frequency response VSWR:

(a) frequency-independent vibrator;

b) dipole.

The proposed device is frequency-independent vibrator (figure 1) consists of symmetric electric vibrator having two conductors: radiant and passive shoulder 1 shoulder (base) 2; a matching network of the two conductors connected in series, one end of the conductor 3 is connected to the outer side of the passive shoulder 2, and the other end 4 is connected with the radiating shoulder 1 of the vibrator through the capacity of the links 5 and respectively with the outer side passive shoulder 2 of the vibrator through the tank circuit 6.

Figure 2 and 3 shows examples of constructive perform frequency-independent vibrator in the air-strip design. Figure 2 shoulders 1, 2 symmetric electric vibrator and the conductors 3, 4 matching network with a total length of less than λ/4 made of plates (aluminum, steel), and the capacity of the links 5 and container of the feature contour 6 of the segments of the coaxial cable 50 Ohm,
the geometric length of which is less than λ/4.

The power cable 7 (75 Ohm) connected to the ends of the arms of the vibrator, which are interconnected using a dielectric support 8, and their opposite ends are connected through the dielectric support 9.

Figure 3 frequency-independent vibrator is depicted with a shield made in the form of cones 10, 11 of the metal mesh, the cells of which are 0, 1 λ min Their ends soldered to the outer sides of the radiating shoulder 1 of the vibrator and the conductors 3, 4 matching chain.

At the vertices of the cones is a plate 12 of radar absorbing material. The transverse dimensions of the conductors (aluminum) matching network and the radiating arm of the vibrator is equal to (3×8) mm2and passive shoulder respectively (4×15) mm2provide acceptable value of their wave resistance (less than 300 Ohms) and remove from passive shoulder.

The dimensions of the dipole (150×760) mm2, a matching circuit (130×550) mm2. Figure 4 presents the values of the VSWR of the vibrator when the length of the concerns of the cable 7 m in range (20-1200) MHz. The overlap factor of the frequency range of the experimental frequency response of the frequency-independent vibrator is 20:1 with an SWR<a 2.5. The overlap in frequency dipole will be (52-100) MHz with an SWR<a 2.5. The use of the proposed frequency-independently researched and is independent of the vibrator allows you to cover the entire frequency range of domestic television and design of the vibrator antennas as the air-strip,
and microstrip implementation.

1. Electric vibrator with the supply line in the form of a coaxial cable and a matching network of the two conductors connected in series, one end of which is connected to the arm of the vibrator, wherein the inner conductor coaxial line is connected to the radiating arm of the vibrator located above his passive shoulder (base), and on the other side of this shoulder is matching device made in the form of a parallel circuit, the total end of the tank circuit and one of the conductors of the matching circuit via the capacitance is connected to the radiating arm of the vibrator and the other end of the tank circuit is connected to a passive shoulder of the vibrator, which is also connected the ends of the radiating arm of the vibrator and the matching circuit using a dielectric supports.

2. The device according to claim 1, wherein the outer sides of the radiating arm of the vibrator and the conductors of the matching circuit is made in the form of plates, soldered metal mesh in the form of cones at the vertices of which is fixed a plate of radar absorbing material.

SUBSTANCE: invention is related to radio engineering, in particular to antennas, and may be used in transceiving devices at frequencies of higher than 1 GHZ with application of various supply lines. Wideband zigzag antenna, comprising active vibrator, consists of two identical metal arms, located symmetrical relative to supply points. Technical result is achieved by the fact that antenna is added with a matching element. Identical metal arms of active vibrator have elliptical shape. Matching element consists of two conducting planes of elliptical shape, every of which has a permanent gap relative to according metal arm of active vibrator.

EFFECT: provision of proper extent of matching with various supply lines, having standardised inlet resistances of 37,5 Ohm and more.

SUBSTANCE: each arm of half-wave dipole is assembled of three conducting semi-rings hinged together at ends and turned to -shaped working position. Dipole arms are reflection symmetric and shorted out at midpoints of upper semi-rings by means of conducting jumper. Each dipole arm can be made of two hinged semi-rings turned to -shaped working position. Arms are shorted out at hinged points of semi-rings. Flat arm width amounts to 0.04 - 0.05 of mean VHF wavelength in operating frequency band of antenna that incorporates provision for excitation dispensing with balancing device.

FIELD: superbroad-band microwave antennas that can be used in phased antenna arrays for communication systems, superbroad-band radars, and metrology.

SUBSTANCE: proposed antenna incorporating ability of forming linear phase-frequency characteristic has first and second additional metal plates as well as sections of input and additional input transmission line which are connected on one end to second main and second additional metal plates, respectively, and on other end they are interconnected through jumper; first side edges of surfaces of first and second main and second additional metal plates are expanding in direction of longitudinal coordinate of antenna; first side edge of first main metal plate on length between first coordinate surface and second one and first side edges of second main and second additional metal plates on length between first coordinate surface and third one are disposed on third coordinate plane. Alternative design of antenna incorporating newly introduced first metal plate installed symmetrically to first main metal plate relative to coordinate surface parallel to second coordinate plane is given in description of invention.

The invention relates to the field of radio engineering, in particular to the class of broadband unidirectional array of antennas, and can find application in communication systems, Metrology, in problems of electromagnetic compatibility

FIELD: superbroad-band microwave antennas that can be used in phased antenna arrays for communication systems, superbroad-band radars, and metrology.

SUBSTANCE: proposed antenna incorporating ability of forming linear phase-frequency characteristic has first and second additional metal plates as well as sections of input and additional input transmission line which are connected on one end to second main and second additional metal plates, respectively, and on other end they are interconnected through jumper; first side edges of surfaces of first and second main and second additional metal plates are expanding in direction of longitudinal coordinate of antenna; first side edge of first main metal plate on length between first coordinate surface and second one and first side edges of second main and second additional metal plates on length between first coordinate surface and third one are disposed on third coordinate plane. Alternative design of antenna incorporating newly introduced first metal plate installed symmetrically to first main metal plate relative to coordinate surface parallel to second coordinate plane is given in description of invention.

SUBSTANCE: each arm of half-wave dipole is assembled of three conducting semi-rings hinged together at ends and turned to -shaped working position. Dipole arms are reflection symmetric and shorted out at midpoints of upper semi-rings by means of conducting jumper. Each dipole arm can be made of two hinged semi-rings turned to -shaped working position. Arms are shorted out at hinged points of semi-rings. Flat arm width amounts to 0.04 - 0.05 of mean VHF wavelength in operating frequency band of antenna that incorporates provision for excitation dispensing with balancing device.

SUBSTANCE: invention is related to radio engineering, in particular to antennas, and may be used in transceiving devices at frequencies of higher than 1 GHZ with application of various supply lines. Wideband zigzag antenna, comprising active vibrator, consists of two identical metal arms, located symmetrical relative to supply points. Technical result is achieved by the fact that antenna is added with a matching element. Identical metal arms of active vibrator have elliptical shape. Matching element consists of two conducting planes of elliptical shape, every of which has a permanent gap relative to according metal arm of active vibrator.

EFFECT: provision of proper extent of matching with various supply lines, having standardised inlet resistances of 37,5 Ohm and more.

SUBSTANCE: device is a dipole whose radiating arm lies over a passive arm (base) and on its opposite side there is a matching circuit in form of a parallel circuit consisting of two conductors connected in series and a capacitor. The common end of the capacitor of the circuit and one of the conductors of the matching circuit are connected to the radiating arm of the dipole through a coupling capacitor, and its other ends are connected to the outer side of the passive arm of the dipole, respectively. The arms of the dipole and conductors of the matching circuit are made from plates and capacitor elements are made from pieces of coaxial cable. Corresponding ends of the arms of the dipole and the matching circuit are connected via dielectric supports. Metal grids in form of cones, on whose apexes there is an antiradar plate, can be soldered to outer sides of the radiating arm of the dipole and conductors of the matching circuit.

SUBSTANCE: RFID system includes an RFID antenna unit configured to be mounted on a product module in a processing system. The product module is configured to engage and disengage with at least one product container. A first RFID label unit is configured to be mounted on at least one product container. At least one product container is configured to hold the first RFID label unit in the detection zone of the RFID antenna unit when the product module is engaged with at least one product container.

SUBSTANCE: antenna device, which consists of an antenna and a drive over the housing of the superstructure and a drive control unit, having an output which is connected to the input of the drive, rigidly connected to the antenna, characterised by that the device includes a radiotransparent deep-water protective casing with an antenna and a drive, rigidly connected inside with the housing of the superstructure, having a rigid connection with the drive, the input of which is connected to the output of the drive control unit through a hole in the housing of the superstructure.

SUBSTANCE: compact ultra-wideband antenna is designed to set up a radio link near the surface of a human body between devices that do not have an unobstructed line of sight, which consists of two symmetric radiating elements situated on one side of a dielectric layer, and a differential strip power supply line situated on both sides of said dielectric layer, the upper and lower sides of which tightly adjoin additional upper and lower dielectric layers, respectively, and two connecting plates with interlayer connections, capable of creating electrical contact between ends of said radiating elements, placed on outer surfaces of said upper and lower dielectric layers; wherein the symmetric radiating elements have recesses at the ends, as well as recesses inside such that the radiating elements are U-shaped, and the radiating elements have additional recesses on their inner and outer periphery.

SUBSTANCE: invention relates to radio engineering and can be used as an antenna for radiating a high-frequency electromagnetic field in the short-wave range. Disclosed is a vertical, symmetrical short-wave dipole antenna, the phase of the magnetic component of the radiated field and the value of the electrical component of said field of which are controlled such that the ratio of the electric field strength to the magnetic field strength is equal to the wave impedance of the propagation medium.

EFFECT: reduced loss of energy in the near radiation zone of the antenna when generating a field in said medium.

SUBSTANCE: method of dynamic change of transceiver antenna characteristics is that the oscillator operates in a three-dimensional figure with a plurality of faces and edges. This match pairs of vertices of the oscillator, space is configured to interface overcommutation ribs of mating peaks.

EFFECT: technical result is to enable dynamic change of transceiver antenna characteristics, namely the radiation pattern, impedance, gain and polarization of the antenna without changing its geometry.

SUBSTANCE: antenna comprises two parallel dipoles connected via two jumpers with a variable length, a balance device, a compensator of an idle component of the antenna input impedance, feeder, RF-connector, dielectric end spacers mounted on the ends of the dipoles, and a dielectric spacer, wherein the first dipole has a gap (clearance) where it connects to the conductors of the balance device, two washers, an exciting conductor, a dielectric substrate, a protective cover.

EFFECT: providing a broad band of antenna matching with the feeder, the antenna has a high degree of protection against the antenna effect, suitable for placement on masts or tower zones, allows high-power signal radiation.